This huge object just set off Earth's defence system after it was seen entering our Solar System. Today, we take a look at what this object is that was seen entering our Solar System.
In recent years NASA has observed countless interesting space events, many of which have helped us to develop our knowledge about the cosmos, and what lies within it. However, every so often NASA and other space agencies will detect something that will leave them asking questions, and although most of these eventually get explained, some of them remain a mystery.
